From: kazaam <kazaam@...>
Date: 2007-10-06T02:25:05+09:00
Subject: Ruby Socket: I found a misstake in the doc. Can someone confirm it and who's gonna fix this doc-error?

Hi,
I'm playing around with sockets in ruby and took a look at the docs(http://www.ruby-doc.org/stdlib/libdoc/socket/rdoc/index.html). There are some examples like this here(http://www.ruby-doc.org/stdlib/libdoc/socket/rdoc/classes/Socket.html#M004166):

     require 'socket'
     include Socket::Constants
     socket = Socket.new( AF_INET, SOCK_STREAM, 0 )
     sockaddr = Socket.pack_sockaddr_in( 2200, 'localhost' )
     socket.bind( sockaddr )
     socket.listen( 5 )
     client, client_sockaddr = socket.accept
     puts "The client said, '#{socket.readline.chomp}'"
     client.puts "Hello from script one!"
     socket.close

But that example is wrong! It has to be client.readline.chomp and not socket.readline.chomp. Take this example by me:

#!/usr/bin/env ruby

$Verbose=true

require 'socket'

mysocket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
socketaddress = Socket.pack_sockaddr_in( 2201, 'localhost' )
mysocket.bind(socketaddress)
mysocket.listen( 5 )
client, client_sockaddr = mysocket.accept
puts client.readline.chomp #reading from the client fd
mysocket.close

execute it and connect with netcat: "nc localhost 2201" , now type something in netcat and you will see everything is fine but now let's change it to the doc way:

#!/usr/bin/env ruby

$Verbose=true

require 'socket'

mysocket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
socketaddress = Socket.pack_sockaddr_in( 2201, 'localhost' )
mysocket.bind(socketaddress)
mysocket.listen( 5 )
client, client_sockaddr = mysocket.accept
puts mysocket.readline.chomp #reading from the socket fd
mysocket.close

If you connect now to it with nc the ruby-script will crash:
./sockettest.rb:13:in `readline': Transport endpoint is not connected (Errno::ENOTCONN)
        from ./sockettest.rb:13


Can someone confirm it and who's gonna fix this doc-error?

-- 
kazaam <kazaam@oleco.net>